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A082815 Consider primes p with a unique representation p = x^2 + y^2, where x is least primitive root of p. a(n) is the first such prime with x increasing in the sequence, x can be found in A082816. 2
2, 5, 3061, 398261, 2387221, 8935021, 514613581 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A082842 includes all numbers having primitive roots.

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

398261 = 10^2 + 631^2 and 10 is least primitive root of 398261.

CROSSREFS

Cf. A001481, A002313, A082816, A082842.

Sequence in context: A215436 A082973 A187604 * A115893 A323338 A057678

Adjacent sequences:  A082812 A082813 A082814 * A082816 A082817 A082818

KEYWORD

nonn,more

AUTHOR

Sven Simon, May 24 2003

EXTENSIONS

Offset 1 from Michel Marcus, Oct 31 2018

STATUS

approved

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Last modified January 22 05:11 EST 2019. Contains 319353 sequences. (Running on oeis4.)